Nozzle construction



ASH ET 1 e She 2 1960 c. M. ASHLEY ETAL 2,962,953

NOZZLE CONSTRUCTION 2 Sheets-Sheet 2 Filed Jan. 13, 1956 FIG. 5

FIG. 3

INVENTORS. CARLYLE M. ASHLEY.

WILLIAM H. ROBERTS. BY

ATTORNEY.-

llniteci States Paten -6 a NOZZLE CONSTRUCTION Carlyle M. Ashley, Fayetteville, and William H. Roberts, Syracuse, N.Y., assignors to Carrier Corporation, Syracuse, N.Y., a corporation of New York Filed Jan. '13, 1956,'Ser. No. 559,062

.8 Claims- (Cl. 98-40) This invention relates :to .nozzle construction and, more particularly, to a nozzle member for :use in an :air conditioning .unit of the induction type.

In Carrier .Patent No. 2,363,294, granted November 21, 1944, there is disclosed :an air conditioning system for multi-room buildings in which air conditioning units of the induction type areemployed. This system contemplates the supply of conditioned air from a central station at high velocity and static pressure through small conduits -to room units placedin the rooms being conditioned. Each room unit includes a heat exchanger through which cold or hot water may be passed depending upon temperamm conditions .exteriorly of the building. The streams .of. conditioned primary sair;(cold or warm) from .the central station is discharged into the unit throughv nozzle members at a velocity such .;as to induce a secondary stream of room air into the unit through the heat .ex-

changer -.to mix therewith. The mixture of primary and secondary air is then discharged into the room Ibeing conditioned to cool or to heat the same.

The chief object of the present invention is to provide an improved nozzle construction for use in an aircondition which comprises a hollow nozzle member including two opposed planar surfaces, the contour .Ofcach surface being defined by two substantially straight lines-extend.- ;ing at an angle to each other and an arcuate line joining the substantiallystraight lines, the arcuate portions of the planarsurfaces being joined by an :arcuatessurface extending from one arcuate portion to the other arcuate portion of the opposed planar surfaces, a surface connecting two opposite planar portions of the opposed planar surfaces having a :plurality of openings through which jets of air may be dIscharged from the member, 1116 edges of the remaining planar portions, .theconnecting surface and the arcuate surface forming an inlet for entrance of air into the member.

This invention further relates to an air conditioning {unit comprising, in combination, a base unit including a :plenum member, said plenum member comprising two :separate chambers, means providing passage of treated air from one chamber to the second chamber, means regulating passage of air from the first chamber to the Second chamber to maintain substantially a desired pressure within the second chamber, said first chamber being 2,962,951; Patented Dec. 6, 196a ice lines extending at an'angle to-eachother and an areuate line joining the substantially straight lines, the arcuate portion sof the-planar surfaces being joined byan arcuatc surface extending from one arcuate portion to the other 'arcuate portion of the opposed planar surfaces, asurface connecting two opposite planar portions of the opposed planar surfaces having a plurality of openings therein through which jets of air may be discharged from the member, the edges of the remaining planar portions, the connecting surface .and the arcuate surface forming an inlet for entrance of air into the member from the second chamber, "a heat exchange member adapted to be con- 'nected to a source .of supply of heatexchange medium, discharge of primary air through the nozzle members in ;ducing .astream of secondary air from the area being conditioned through the heat exchange member in heat exchange-relation with medium passing therethrough to mix with :the primary .air being discharged from the second chamber and means for discharging the mixture of 'rprirsnary and secondary air within the area being conditioned.

The attached drawings illustrate .a preferred embodiment of {the invention, in which Figure 1 is aperspective view of the air conditioning unit of the present invention, installed in a room being conditioned;

Figure 2 is a perspective view of the base unit including ,the'heat exchange member, with the housing removed; 4

Figure 3 is asectional view of the nozzle member;

Figure 4 is :a plan view of the nozzle member shownqin Figure 3; and

Figure 5 is a view in front elevation of the nozzle member shown in Figures 3 and 4.

Referring to the attached drawings, there is shown an .air conditioning unit 2 in place beneath a window of a room being treated. Air conditioning unit 2 includes .a base unit 3 (refer to Figure 2), a heat exchange member 4 such as a serpentine coil and a casing or housing 5 having an inlet 6 and an outlet 7. It will be appreciated under some circumstances housing 5 may be omitted and the base unit 3 and heat exchange member 4 furred in, if desired. In such cases, of course, the inlet and outlet are provided in the furred in structure to permit room air to be induced into the unit and the treated air to be supplied to the room.

Base unit 3 comprises a plenum member 10 containing two separate chambers 11 and 12, chamber 12 being placed below chamber 11 in the plenum. Chamber 11 is connected to a central station by small conduits, as described in Patent No. 2,363,294, in order that a stream of primary air or conditioned air may be supplied at high velocity and high static pressure to each air conditioning unit. Chambers 11 and 12 are separated by a partition or damper arrangement 13 which regulates passage of air from chamber 11 to chamber 12 thus maintaining a desired static pressure within chamber 12.

Plenum member 10 is formed of a back sheet 20, a wrapper 21 and end panels 22. Suitable openings are formed in end panels 22 to receive a fitting (not shown) adapted to be attached to a conduit connecting the unit with the central station. If desired, the opening in the opposite end panel 22 may be closed by a plug (not shown) or a similar fitting may be attached thereto to permit a second unit to receive conditioned air from chamber 11 of unit 2. Reference is made to copending application, Serial No. 559,046, filed January 13, 1956, for a more complete description of the air conditioning unit.

A plurality of spaced nozzle members 23 are attached to lower chamber-12, wrapper 21 having openings therein to permit passage of conditioned air from chamber 1:2. to the nozzle members, Each member 23 has a plurality of 31 openings therein, hereinafter described, through which jets of air are discharged in a substantially upward direction.

Each nozzle member 23 includes two opposed planar surfaces 40, 41, the contour of each surface being defined by two substantially straight lines 42, 43 extending at an angle to each other and an arcuate line 44 joining the lines 42, 43. The arcuate portions 44', 44" of the planar surfaces 40, 41 are joined by an arcuate surface 45 extending from arcuate portion 44 to arcuate portion 44" of the surfaces 40, 41. Surface 46 connects opposite planar portions 42", 42 of surfaces 40, 41. A plurality of nozzles 47 having openings 48 therein serve to discharge jets of air from the member. The edges of the remaining planar portions 43', 43" together with the edges of the connecting surface 46 and the arcuate surface 45 form an inlet 49 for entrance of air into the hollow member from lower chamber 12. In other words, the nozzle member includes two opposite side walls 40, 41 an arcuate end wall 45 connecting the side walls, and a top wall 46 connecting the side Walls, these walls being arranged to form an enclosure having an inlet 49 therein permitting air to fiow through the enclosure and to be discharged through nozzles 47 in the top wall 46.

Nozzles 47 are arranged in surface 46 in substantially parallel rows; preferably, nozzles in one row are substantially offset from nozzles in a second row. Referring to Figure 5, it will be noted that a line drawn axially of a nozzle in one row forms an angle of substantially 35 with a line drawn axially of an ofiset nozzle in a second row. That is to say, a line drawn axially through each nozzle forms an angle of substantially 17 /z with a substantially perpendicular line drawn centrally of the nozzle member.

Again referring to Figure 3, it will be noted that lines prolonging the inner wall surfaces of the nozzle closest to inlet 49 form an angle of substantially 52 at their juncture. Lines prolonging the inner wall surfaces of the remaining nozzles form an angle of substantially 35 at their junctures. As shown in Figures 3, 4 and 5, a flange 50 surrounds the inlet 49. Flange 50 has a groove 51 therein which receives the Wall of the opening in wrap-per 21 to attach the nozzle member 23 to the plenum member 10. If desired, any suitable adhesive may be employed to assist in holding the nozzle member 23 in place and to assure in sealing the opening in the Wrapper through which air enters the nozzle member. Nozzle members 23 may be molded of suitable, flexible plastics such as polyethylene, polyvinyl chloride, etc. It is desirable that the member be flexible since such property greatly expedites cleaning of the nozzle and the removal of dirt particles collected therein.

Referring to Figure 2, triangular members 25 are attached to the end panels 22. Coil 4 is attached to and is supported by the triangular members 25. Coil 4 is placed below the nozzle members 23 and the plenum member and extends preferably at an angle to a line drawn perpendicularly of the unit 2. If desired, a condensate pan 27 may be placed below the lowermost portion of coil 4. Any slight amount of condensate collected on coil 4 drips along the fins downwardly and falls into pan 27. It is intended that this unit operate with a dry coil, pan 27 being provided only to meet temporary conditions such as faulty start-up of the system.

As previously dsecribed, base unit 3 and coil 4 may be furred in, if desired. Preferably, however, the air conditioning unit 2 is mounted on a wall of the room being treated. The unit including the coil may be placed 4 to 12 inches, for example, from the fioor of the area being treated to permit such wall suspension. Unit 3 is provided with hook members 29 adapted to hook over and be attached to a strip member (not shown) extending along the wall of the area being conditioned.

Preferably, housing 5 is composed of a cover 30 (refer to Figure 1) having the outlet 7 therein, a removable panel 31, concealing the front of the unit, and end panels 32. Housing 5 does not contain a base so that the bottom of unit 3 is open permitting secondary air from the area being conditioned to be drawn into the unit through the bottom thereof. Cover 30 carries hooks (not shown) which permit the housing to be suspended from the wall strip referred to above.

In operation, a central station (not shown) supplies conditioned air to upper chamber 11 of plenum member 10. Air passes from chamber 11 through the damper arrangement 13 to chamber 12, static pressure in chamber 12 being regulated by the damper arrangement to maintain a desired static pressure therein. Jets of air are discharged from chamber 12 through nozzle members 23 at a predetermined velocity. Discharge of primary air through nozzle members 23 induces secondary air from the area being conditioned through inlet 6 and through coil 4 in heat exchange relation with heat exchange medium passing through the coil. The stream of secondary air after passage through coil 4 mixes with the streams of primary air being discharged from nozzle members 23, the mixture of primary and secondary air being discharged through outlet 7 into the area being conditioned.

The wrapper of plenum member 10 cooperates with the cover 30 and panel 31 to form a diffuser thus per-mitting more satisfactory mixing of the streams of primary and secondary air.

The present invention provides a simple, economical nozzle member which assures adequate mixing of the streams of primary and secondary air. The nozzle members of the present invention are particularly quiet in operation permitting a low noise level to be maintained when the unit is in operation. The nozzle construction may be easily and cheaply molded of plastics permitting the nozzle members to be simply attached to the plenum member and assuring a desired stream line flow of air to and through the openings of the nozzles. Such flexible construction of the nozzle greatly enhances cleaning of the nozzles since dust and dirt particles collected therein may be easily removed.

While I have described a preferred embodiment of the invention, it will be understood the invention is not limited thereto since it may be otherwise embodied within the scope of the following claims.

We claim:

1. A hollow air discharge member for use in an air conditioning unit including two opposite, spaced, planar wall portions, the contour of each wall portion being defined by two substantially straight edge portions extending at an angle to each other and an arcuate edge portion joining the substantially straight edge portions, the arcuate edge portions of the planar wall portions being joined by an arcuate wall portion extending from one arcuate edge portion to the other arcuate edge portion of the opposed planar wall portions, an upper wall portion connecting two opposite edge portions of the opposed planar wall portions having a plurality of openings therein through which jets of air may be discharged substantially upwardly from the member, nozzle members having their upwardly projecting sidewalls protruding from said upper wall portion defining the discharge openings, the remaining planar edge portions, the connecting wall portion and the arcuate wall portion forming an inlet in one side of the member adjacent the connecting wall portion and substantially opposite the arcuate wall portion for entrance of air into the member.

2. An air discharge member according to claim 1 in which the nozzles are placed in substantially parallel rows.

3. An air discharge member according to claim 2 in which nozzles in one row are substantially offset from nozzles in a second row.

4. An. air discharge member according to claim 3 in which a line drawn axially of a nozzle in one row forms an angle of substantially 35 with a line drawn axially of an offset nozzle in a second row.

5. An air discharge member according to claim 3 in which lines drawn axially of the nozzles form angles of substantially 17 /2 with substantially perpendicular lines drawn centrally of the air discharge member.

6. A hollow air discharge member for use in an air conditioning unit including two opposed, planar, wall portions, the contour of each wall portion being defined by two substantially straight edge portions extending at an angle to each other and an arcuate edge portion joining the substantially straight edge portions, the arcuate edge portions of the planar wall portions being joined by an arcuate wall portion extending from one arcuate edge portion to the other arcuate edge portion of the opposed planar wall portions, an upper wall portion connecting two opposite planar edge portions of the opposed, planar wall portions, nozzle members having their upwardly projecting side walls protruding from the upper connecting wall portion having openings therein through which jets of air may be discharged substantially upwardly from the member, said nozzles being arranged in substantially parallel rows, nozzles in one row being offset from nozzles in a second row, the remaining planar edge portions, the connecting wall portion and the arcuate wall portion forming an inlet in one side of the member adjacent the connecting wall portion and substantially opposite the arcuate wall portion for entrance of air into the member,

lines drawn prolonging the inner wall portions of the nozzle closest to the inlet forming an angle of substantially 52 at their juncture while lines drawn prolonging the inner wall portions of the remaining nozzles form an angle of substantially at their junctures.

7. An air discharge member according to claim 6, in which a flange surrounds the inlet, said flange having a groove therein extending about the inlet to receive the wall of an opening to which the member is connected.

8. An air discharge member according to claim 7 in which a line drawn axially of a nozzle in one row forms an angle of substantially 35 with a line drawn axially of an adjacent offset nozzle in a second row.

References Cited in the file of this patent UNITED STATES PATENTS 1,847,619 Mascolo Mar. 1, 1932 2,249,274 Faine July 15, 1941 2,254,751 Paradise Sept. 2, 1941 2,347,149 Chirgwin Apr. 18, 1944 2,363,294 Carrier Nov. 21, 1944 2,400,880 Happmann May 28, 1946 2,469,534 Wessels May 10, 1949 2,492,757 Meek Dec. 27, 1949 2,719,994 Dorsey Oct. 11, 1955 FOREIGN PATENTS 1,101,736 France Apr. 27, 1955 

